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    • 3. 发明授权
    • Method for enhancing the echogenicity and decreasing the attenuation of
microencapsulated gases
    • 增强微囊化气体的回声和减少衰减的方法
    • US6045777A
    • 2000-04-04
    • US885933
    • 1997-06-30
    • Charles C. ChurchHoward BernsteinJulie Ann StraubHenry T. Brush
    • Charles C. ChurchHoward BernsteinJulie Ann StraubHenry T. Brush
    • A61K49/00A61B8/00A61K49/22A61K49/04A61B8/14
    • A61B8/481A61K49/223
    • It has been discovered microparticles formed from natural or synthetic polymer with thicker walls have significantly enhanced echogenicity as compared with microparticles having thinner walls. The effect of wall thickness has been determined experimentally as well as inserted into a formula for use in predicting the optimum conditions. In the preferred embodiment, the polymers are synthetic biodegradable polymers and the wall thickness is between about 100 and 660 nm, although wall thicknesses from about 20 nm to in excess of 500 nm can be used. The microparticles are manufactured with a diameter suitable for the targeted tissue to be imaged, for example, with a diameter of between 0.5 and 8 microns for intravascular administration, and a diameter of between 0.5 and 5 mm for oral administration for imaging of the gastrointestinal tract or other lumens. Preferred polymers are polyhydroxy acids such as polylactic acid-co-glycolic acid, polylactide or polyglycolide, most preferably conjugated to polyethylene glycol or other materials inhibiting uptake by the reticuloendothelial system (RES). The microspheres may be used in a variety of ultrasound imaging applications including cardiology applications, blood perfusion applications as well as for organ and peripheral vein imaging.
    • 与具有较薄壁的微粒相比,发现由具有较厚壁的天然或合成聚合物形成的微粒具有显着增强的回声性。 实验确定了壁厚的影响,并将其插入到用于预测最佳条件的公式中。 在优选的实施方案中,聚合物是合成的可生物降解聚合物,并且壁厚度在约100至660nm之间,尽管可以使用约20nm至超过500nm的壁厚。 制造具有适于待成像的目标组织的直径的微粒,例如,用于血管内施用的直径为0.5至8微米,并且用于口服给药以用于胃肠道成像的直径为0.5至5毫米 或其他流明。 优选的聚合物是聚羟酸,例如聚乳酸 - 共 - 乙醇酸,聚丙交酯或聚乙交酯,最优选与聚乙二醇缀合或抑制网状内皮系统(RES)吸收的其它物质。 微球可以用于各种超声成像应用,包括心脏应用,血液灌注应用以及器官和外周静脉成像。
    • 4. 发明授权
    • Polymer-lipid microencapsulated gases for use as imaging agents
    • 用作成像剂的聚合物 - 脂质微胶囊化气体
    • US5837221A
    • 1998-11-17
    • US681710
    • 1996-07-29
    • Howard BernsteinJulie Ann StraubHenry T. BrushCharles C. Church
    • Howard BernsteinJulie Ann StraubHenry T. BrushCharles C. Church
    • A61K49/00A61K49/22C08J3/20A61K49/04A61K9/14
    • A61K49/0002A61K49/0004A61K49/223
    • It has been discovered that the incorporation of gases, especially fluorinated gases such as perfluorocarbons, into microparticles formed from the combination of a natural or synthetic polymer and lipid have significantly enhanced echogenicity as compared with microparticles not including the lipid. Compounds other than lipids which are hydrophobic and limit the penetration and/or uptake of water into the microparticles can also be incorporated into the microparticles to enhance echogenicity. In the preferred embodiment, the polymers are synthetic biodegradable polymers. The microparticles are manufactured with a diameter suitable for the targeted tissue to be imaged, for example, with a diameter of between 0.5 and 8 microns for intravascular administration, and a diameter of between 0.5 and 5 mm for oral administration for imaging of the gastrointestinal tract or other lumens. Preferred polymers are polyhydroxy acids such as polylactic acid-co-glycolic acid, most preferably conjugated to polyethylene glycol or other materials inhibiting uptake by the reticuloendothelial system (RES). The most preferred lipids are phospholipids, preferably dipalmitoylphosphatidylcholine (DPPC), distearoylphosphatidylcholine (DSPC), diarachidoylphosphatidylcholine (DAPC), dibehenoylphosphatidylcholine (DBPC), ditricosanoylphosphatidylcholine, dilignoceroylphatidylcholine (DLPC), incorporated at a ratio of between 0.01-30 (w lipid/w polymer), most preferably between 0.1-10 (w lipid/w polymer). Microparticles for imaging using other detectable agents can be similarly manufactured.
    • 已经发现,与不包括脂质的微粒相比,将天然或合成聚合物和脂质的组合形成的气体,特别是氟化气体(例如全氟化碳)并入微型颗粒中显着增强了回声反应性。 疏水性的脂质以外的化合物也限制在微粒中的渗透和/或吸收也可以并入微粒中以增强回声性。 在优选的实施方案中,聚合物是合成的可生物降解的聚合物。 制造具有适于待成像的目标组织的直径的微粒,例如直径为0.5至8微米,用于血管内施用,并且用于口服给药的直径在0.5至5mm之间以用于胃肠道成像 或其他流明。 优选的聚合物是聚羟基酸,例如聚乳酸 - 共 - 乙醇酸,最优选与聚乙二醇缀合或抑制网状内皮系统(RES)摄取的其它物质。 最优选的脂质是磷脂,优选二棕榈酰磷脂酰胆碱(DPPC),二硬脂酰磷脂酰胆碱(DSPC),二酰氨基磷脂酰胆碱(DAPC),二苯甲酰磷脂酰胆碱(DBPC),二硫代酰基磷脂酰胆碱,二烯酰基脂肪酰胆碱(DLPC),其比例为0.01-30(w脂质/ ),最优选0.1-10(w脂/ w聚合物)。 可以类似地制造用于使用其它可检测试剂成像的微粒。
    • 8. 发明申请
    • POROUS DRUG MATRICES AND METHODS OF MANUFACTURE THEREOF
    • 多糖药物及其制造方法
    • US20110129533A1
    • 2011-06-02
    • US13022776
    • 2011-02-08
    • Julie StraubDavid AltreuterHoward BernsteinDonald E. Chickering, IIISarwat KhattakGreg Randall
    • Julie StraubDavid AltreuterHoward BernsteinDonald E. Chickering, IIISarwat KhattakGreg Randall
    • A61K31/337A61K9/10A61P35/00
    • A61K9/1635A61K9/1611A61K9/1623A61K9/1688A61K9/1694
    • Drugs, especially low aqueous solubility drugs, are provided in a porous matrix form, preferably microparticles, which enhances dissolution of the drug in aqueous media. The drug matrices preferably are made using a process that includes (i) dissolving a drug, preferably a drug having low aqueous solubility, in a volatile solvent to form a drug solution, (ii) combining at least one pore forming agent with the drug solution to form an emulsion, suspension, or second solution and hydrophilic or hydrophobic excipients that stabilize the drug and inhibit crystallization, and (iii) removing the volatile solvent and pore forming agent from the emulsion, suspension, or second solution to yield the porous matrix of drug. Hydrophobic or hydrophilic excipients may be selected to stabilize the drug in crystalline form by inhibiting crystal growth or to stabilize the drug in amorphous form by preventing crystallization. The pore forming agent can be either a volatile liquid that is immiscible with the drug solvent or a volatile solid compound, preferably a volatile salt. In a preferred embodiment, spray drying is used to remove the solvents and the pore forming agent. The resulting porous matrix has a faster rate of dissolution following administration to a patient, as compared to non-porous matrix forms of the drug. In a preferred embodiment, microparticles of the porous drug matrix are reconstituted with an aqueous medium and administered parenterally, or processed using standard techniques into tablets or capsules for oral administration.
    • 药物,特别是低含水溶性药物以多孔基质形式提供,优选微粒,其增强药物在水性介质中的溶解。 药物基质优选使用以下方法制备,所述方法包括(i)将挥发性溶剂中的药物(优选为低溶解度的药物)溶解以形成药物溶液,(ii)将至少一种成孔剂与药物溶液 以形成稳定药物并抑制结晶的乳液,悬浮液或第二溶液和亲水或疏水赋形剂,和(iii)从乳液,悬浮液或第二溶液中除去挥发性溶剂和成孔剂以产生多孔基质 药物。 可以选择疏水性或亲水性赋形剂,以通过抑制晶体生长来稳定药物的结晶形式,或者通过防止结晶来稳定药物的无定形形式。 成孔剂可以是与药物溶剂或挥发性固体化合物,优选挥发性盐不混溶的挥发性液体。 在优选的实施方案中,使用喷雾干燥来除去溶剂和成孔剂。 与药物的无孔基质形式相比,得到的多孔基质在给予患者后具有更快的溶解速率。 在优选的实施方案中,多孔药物基质的微粒用水性介质重新配制,并肠胃外给药,或使用标准技术加工成用于口服给药的片剂或胶囊。
    • 9. 发明申请
    • ASSAYS INVOLVING COLORIMETRIC AND OTHER SIGNALING
    • 涉及彩色和其他信号的测定
    • US20100330703A1
    • 2010-12-30
    • US12822393
    • 2010-06-24
    • Howard BernsteinDonald E. Chickering, IIITimothy M. Blicharz
    • Howard BernsteinDonald E. Chickering, IIITimothy M. Blicharz
    • G01N33/543G01N21/00G01N21/62
    • G01N33/54313G01N21/78G01N21/783G01N21/80G01N21/82G01N2021/7783G01N2021/7786
    • The present invention generally relates to particles and, in particular, to methods of determining binding involving particles, e.g., using colorimetric and other signaling techniques. In one aspect, a mixture of particles of different colors (e.g., at least a first color and a second color) is provided that exhibits a first collective color, e.g., due to the presence of the different colors of particles within the mixture. The mixture can then be exposed to a medium containing a binding partner able to preferentially bind to some of the particles, e.g., particles of a first color relative to particles of a second color. The bound particles can be separated in some fashion (e.g., filtration, gravity, magnetism, centrifugal separation, etc.), such that the mixture exhibits a second collective color, e.g., due to the presence of a greater number of particles of the second color relative to the number of particles of the first color. Accordingly, by visualizing or otherwise determining a color change, a binding event may be determined. Other aspects of the invention relate to kits involving such particles, methods of promoting the making or use of such particles, or the like.
    • 本发明一般涉及颗粒,特别是关于确定涉及颗粒的结合的方法,例如使用比色和其它信号传导技术。 在一个方面,提供了不同颜色(例如,至少第一颜色和第二颜色)的颗粒的混合物,其表现出第一集合颜色,例如由于在混合物内存在不同颜色的颗粒。 然后可以将混合物暴露于含有能够优先结合一些颗粒的结合配偶体的介质,例如相对于第二种颜色的颗粒的第一种颜色的颗粒。 结合的颗粒可以以某种方式分离(例如,过滤,重力,磁性,离心分离等),使得混合物呈现第二集合颜色,例如由于存在更多数量的第二 颜色相对于第一种颜色的颗粒数。 因此,通过可视化或以其他方式确定颜色变化,可以确定结合事件。 本发明的其它方面涉及涉及这种颗粒的试剂盒,促进制造或使用这种颗粒的方法等。